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-30-4x=72-2x
We move all terms to the left:
-30-4x-(72-2x)=0
We add all the numbers together, and all the variables
-4x-(-2x+72)-30=0
We get rid of parentheses
-4x+2x-72-30=0
We add all the numbers together, and all the variables
-2x-102=0
We move all terms containing x to the left, all other terms to the right
-2x=102
x=102/-2
x=-51
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